Velo Reading at 90 Feet

90ft???? makes no sense to me, maybe he's looking to convert him to a ss or 3b.....but maybe someone can explain

Not sure there would be any velo difference on the gun whether he's throwing from 60' or 90' unless he's really, really good with the gun.  It's going to pick up the ball as soon as it leaves his hand either way.  

 I have never heard of a college doing this before.

If I had to guess, the 90 feet was irrelevant for the speed issue - but if you have good control at 90 feet, it should be really good at 60 feet.

Carnival scout?

Maybe the scouts mindset is that he is getting the velocity at a more true 60 feet if the gun picks it up at the distance. Some have said that it starts to measure out of the hand so I don't know if that is valid. I guess the Q is at what distance the gun picks up the ball??

My best college try:

The gun will start measuring the velocity of the ball as soon as the ball (which may still be in the pitchers hand) reaches the guns "threshold" (i.e 30 mph...I don't know specifics of the gun).  The gun will track the velocity of the ball once it reaches the threshold and stop tracking when the velocity goes below the threshold.  The max velocity will be displayed for the operator (scout).  Some guns record the initial and max velocity.

The "scout" may have wanted to measure the velocity over 90 feet to determine if the throwers velocity was sustained over the last 30 feet or significantly tapered off.

If a guy throws 90mph....it's 90mph...and no matter who is throwing it, it's going to drop off at essentially the same speed.  You can't have a guy releasing the ball at 90 and hitting the catcer at 86....and another release it at 90 and hit the glove at 78...assuming they're both throwing a straight fastball.   The ball slows down because of drag....and drag is constant.